Kinetic studies on combustion of microalgae under different oxygen concentrations

摘要：

　　In this paper,the combustion behavior of Chlorella vulgaris (a genus of unicellular green microalgae) was investigated in a thermogravimetric analyzer (TGA) from room temperature to 800℃ in O2/N2 atmospheres.The effects of different oxygen concentrations (20,50,60,80 vol.%) in the heating rates 20℃·min-1 on the combustion processes of Chlorella vulgaris had been studied.The results indicated that the combustion processes of Chlorella vulgaris could be divided into three stages.The oxygen concentrations had important effects on the main combustion processes of Chlorella vulgaris.The isoconversional method involving Flynn–Wall–Ozawa (FWO) and the Kissinger–Akahira–Sunose (KAS) methods were used for the kinetic analysis of the main combustion process.The results indicated that,when the oxygen concentration varied from 20 to 80 vol.%,the value of activation energy increased respectively from 134.03 to 241.04 kJ·mol-1 by using FWO method and from 134.53 to 242.33 kJ·mol-1 by KAS method.Moreover,the optimal oxygen concentration for Chlorella vulgaris combustion was 25-35 vol.%.

关键词： Oxygen concentration Combustion TGA Kinetics

作者: Qing Xu Jun Li Aixia Xie

作者单位: College of Engineering, Guangdong Ocean University,Jiefang east road 40, Xiashan District Zhangjiang, China

会议类型: 国际会议

会议名称: 2013 可再生能源与环境材料国际会议

会议地点: 成都

会议语种:英文

页码: 354-358

在线出版日期: 2013-08-01（万方平台首次上网日期，不代表论文的发表时间）